package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.mail.Session;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.json.simple.JSONObject;

import DB.ChatTableDB;
import DB.GroupTableDB;

import com.google.gson.JsonObject;

public class GetChats extends HttpServlet {

	List<JSONObject> Messages;
	/**
	 * Constructor of the object.
	 */
	public GetChats() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
			//String userID = (String)request.getAttribute("email");
			String groupID = (String)request.getAttribute("group");
			HttpSession session = request.getSession(true);
			//mark the group is deleted
			session.setAttribute(groupID, "0");
			JsonObject  object = new JsonObject ();
			ArrayList<JsonObject> result = new ArrayList<JsonObject>();
			response.setContentType("application/json");
			PrintWriter out = response.getWriter();
			/*if(userID == null || userID.equals("")){
				object.addProperty("message", "The user should not be empty!");
				response.setContentType("application/json");
				PrintWriter out = response.getWriter();
				out.print(object);
				out.flush();
				out.close();
			}else*/ if(groupID == null || groupID.equals("")){
				object.addProperty("message", "The group has been deleted by the owner!");

				out.print(object);
				
			}else {
				session.setAttribute( "group", groupID);
				ChatTableDB chatTableDB = new ChatTableDB();
				GroupTableDB groupTableDB = new GroupTableDB();		
				result = chatTableDB.selectChatsByGroup(groupID);			
				out.print(result);

			}
			out.flush();
			out.close();
			
		
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
